<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>

    <label for="wheelDelta">滚动值:</label>(IE/Opera)
    <input type="text" id="wheelDelta" />
    <label for="detail">滚动值:(Firefox)</label>
    <input type="text" id="detail" />
    <script src="app.js"></script>
</body>

</html>